Improvement in grain-scourers



UNrre States afrenta* Fries.

GARDNER E. THROOP, 0F CHICAGO, ILLINOIS.

IMPROVEMENT IN GRAIN-SCOU PtEFtS.`

Specification forming part of Letters Patent No. @3.035. dated Decenbcr 2:?, 18h13.

To all zqholn'i. it mar/- concern/.4

Beit known that I, Granneman- E. THROOP,

of Chicago, in the county of Cook' and State exact description thereof, reference being had t0 the accompanying drawings, and tothe letters of reference marked thereon.

The nature of my invention consists in con sructin g and arranging in a cylindrical torni ot" a metallic sheet of the requisite length, so p anctured and perforatedwi th numerous small holes with square edges that a cutting or shearing surface is constantly presented tothe .A grain in its winding course down throughthe vcylinder. in wlviich is located a revolving fan, and all locate( in a frame ofsuicient strength "and size.

Figure l is a perspective vic'w. Fig. 2is a "vertical sectional view. Fig. 3 is-a topi-view. Fig 4 is a horizontal sectional view.

of sufficientI length'and thickness to .answer This cylindrical sheet.

the purposedesigned. is punched or perforated with numerous small holes about the sixteenth of an iueh -in dianteter. They might be a very little larger and a trifle smaller, but the size represented inthe drawings and model' accompanyingthis specitication is thel size usually found to answer the purpose. These holes are very close together,

so close. that about one-third ofthe metal is.

cut away. They also present a shearing'surface-to the grain in its downward course,- which is constantly recurring at every perfora-tion. l

C is a shaft passing through the perforated `cylindrical metallic sheet.

L' is the bottom oil-cup, in which the shaft C is inserted, revolvingin its box immediately below the oil-cup.

` M is the top oi1-cup, through which the top end of the shaft passes. The upper end of the shaft works in a box immediately below 4the top oil-cup.

D is the driving-Inllley, located on the shaft C and under the perforated cylindrical metallic sheet". It also may bc located on theup per end and above the upper oileup.

F is a bridge-tree, passing from one side of the frame to the other, upon which is located the oil-cup L and the box in which Works the lower end of the shaft C.

I, Fig.'2, is the top plate, resting `upon the upper end of the frame, and is usually made of metal. l

K is a plate of the same material and situ- 'ated near the other or opposite end of the frame.

G represents an aperture through'the top plate, I.

B B are'fan-blades attached to/shal't C.

O O is a circular piece ofl metal attached to the upper ends of ythe. fan-blades B B.

.H Hare openings in the upper and lower plates, I and K. f.

EE, is th f dischargefspout. i. When this machine is inuse,^motioniscotn-. inuhieated to the fans B B andshaftj. C by a belt passing around the pulleyl D. By' this means the fans B B are caused to revolve to the requisite velocity, which is usually-from five hundred to one thousand revolutions per minute. ful current of air,` which passes from the center out through the various apertures in, the vcyliut'lrical metallic sheet. -Th'e's'e apertures are r'oud and small lin size; but l do not contine myself to an aperture strictly rcund'in form. yThey may Vbe diamondshfape and a littlc larger or4 smaller than those shown in the drawings or model accompanying this specification. the surface of the metallic cylinder, thus presenting csharp and 'cuttingedge-to the grain' as it'passcs through the' cylinder as'before alluded to. Whenv the-fansB B arerevolv'-, ing tothe requisite velocity, the grain is ad mitted within the cylinder through a spout or .cond uit through the'. aperture G. It falls upon the ircularplate- O fastened `upon the upper ends of the fan-.blades BB, which revolving rapidly, is carried outwardly lby centrifugal forceand passes into thccurrents of air generated by the revolution of the fan-blades B B, andv constantly tends topass through the aperturesor perfqrations of vthe,perforated cylindrical metallic sheet.f"-The blossom end,

cfa kernelof Wheatis lighterthan the seed end. The blossom end-is alsocovered with..

This generates a stron g and p o'weraiL They are also out perpendicularly to,`

ahairy fibrous;substance. This hairy iibrous substance is strongly charged with dust and other foreign substances, which areinjurious to the bolt-cloth and greatly lower the quality of iiour. Thedescent ot' the Wheat or grain throughthe cylinder is-winding or circuit'ous.

Some of the advantages 'of this invention are as folio ri`he grain in passi-,ng down through the inder is made to come in contact with the inner surface of thel cylinder, and as there is aseparate and distinct current of air through each aperture, and the blofsam end of a kernel of wheat is lighter than .the seed end, it is held suspended or balanced in the current of air with the lightest Vend nearest the concave surface of the cylinder, and as the kernel or grain in its winding or eircnitous course through the cylinder is constantly rubbed or impinged againstl the many sharp edges formed by the numerous perforations or apertures in the metallic cyl,

inder, by the time it passes out at the dischargespout E the iibrous hairy substance,l

ith all other1 foreign matter mingled with it is thoroughly rubbed `or scoured oft', and is forced out throngh`tlie perforations by the strong currents of air generatedv by the rcvol ving'fa'ns inside of the cylinder. The kernel or grain as it passes in its course downward is forced in contact with the numerous perforations in the cylinder. These present a shearing edge to the grain of vvlieat caused by the edges ofthe holes gradually approaching each other, and in this arises one ot' the greatest and principal advantages in using a cylindrical metal-lic sheet with pert'orations or apertures of the Size and form described in this specification.

` This invention is also adapted to hulling thosekinds of grain which require to be-hnlled, such as buckwleat, rice, Sie. Other machines designed for this purpose have holes or ap ertures mu h longer one way than the other, something like a slot; but no machines haye everbeen used with so numerous and so many perforations in as thisone. The cutting-surface presented in the multitude of perforations give an advantage and produce an effect that no other scouring-machine possesses. lhekernel is constantly forced against sharp edges which recur at every perforation, by the rapidly-revolving fan-blades or their equivalent, on the inside. No dependence is placed upon the grain coming i'n` contact with the edges of the apertures as a means of scouring in any ofthe machines heretofore in use. The l holes or slots have always been so cozstructed that there was little or no scouring-surface presented, but in Amy ,invention a cutting surface is presented of three thirty-seconds of an inch in length at every perforation also, there are several rings passing around -the inside, or sere al ribs ruiming perpendicularly through the cylinders lof scouring-machines heretofore in use, as well as other modifica-- tions to secure a rtnigh and uneven surface for the grain to strike against, but nonchave used or employed the 'means here shown to accomplish the purpose here designed-viz., the scouring oi" grain by a perforated metallic `case and revolving fans, or their equivalent,

4Having thus described my invention, what- I claim as new, and desire to secure by Letters Patent, is l In combination with a grain-scourer constructed substantially as described, the combination ot' the revolving fan blades B B, or their equivalent, with the cutting surfaces or edges in the metallic cylinder A, made @by the numerous small pert'orations in said cylinder, substantially as described.

GARDNER E. THIIOOP. Witnesses:

STEPHEN A. GOODWIN, JAMES A. CoWLEs. 

